【摘 要】
：
损失的确定对整个涡轮机的性能评估极为重要.为找出适用于变几何涡轮的损失模型,该论文计算了Dunham损失模型、Kacker&Okapuu损失模型和Moustapha损失模型,并确定在变几何涡
论文部分内容阅读
损失的确定对整个涡轮机的性能评估极为重要.为找出适用于变几何涡轮的损失模型,该论文计算了Dunham损失模型、Kacker&Okapuu损失模型和Moustapha损失模型,并确定在变几何涡轮的通流计算中采用Dunham损失模型.为了对涡轮变几何后的性能有深入了解,在该论文中建立了一套适用于变几何涡轮的损失计算模型及通流计算模型.通过计算得到了变几何涡轮无因次流量、相对转矩及级效率的涡轮特性曲线,并对其变化规律进行分析和总结.为了进一步展开对变几何涡轮的研究,需要针对性地进行涡轮叶片内部的流动研究.其中包括湍流模型,尾缘后流动的研究.应用商用计算流体力学软件Fluent6.0建立二维模型,计算并分析了不同静叶转角下的压力场、温度场及速度场,并将获得的结果同一元计算的结果做了比较.通过对变几何涡轮的一元计算和二维数值模拟,得到了一些有参考价值的规律.
其他文献
Launch of Chinas maiden Mars mission is near Huailai,a county in Hebei Province bordering Beijing has gained a place in Chinas aerospace history after Asias largest test site for landing on extraterre
该文从弥散介质的辐射特性出发,阐述了一种可同时获取颗粒表面温度和气相温度的在线测量技术--傅立叶变换红外透射/发射(FT-IR E/T)光谱法.通过与不同测温方法对蜡烛火焰、酒
It was 45 years ago, on May 6, 1975, in Beijing when Christopher Soames, Vice President of the European Economic Community (EEC) Commission in charge of extal r
Innovare, the Latin root for innovate, means to renew, and more inclusively, to change. Its contemporary English usage dates more recently to the late Elizabeth
Li Zhe, a violinist who has been with the National Center for the Performing Arts (NCPA) Orchestra for a decade, reached a personal milestone. The NCPA has susp
While the novel coronavirus disease (COVID-19) pandemic has dealt a heavy blow to the global economy, China reported its first economic decline since 1992 when
根据航空燃起涡轮发动机中涡轮导向叶片冷却设计的需要，本文进行了有出流和入流的通道和孔内流场的实验和数值模拟研究，得到了叶片内冷通道的流场特性以及压力系数和孔的流量系
In Guanghe, a county in Linxia Hui Autonomous Prefecture in Gansu Province in northwest China, piles of silage—what lo-cal people call the bread for cattle and